We had about 30 6x6 10ft posts installed about 3 weeks ago. Fence guys showed up with a mini concrete mixer trailer (they mixed at site). They went down 3 feet with the holes and poured concrete.
Currently the concrete still appears very damp and crumbles when I tap it with hammer. When I broke a piece off, I found twigs in the concrete. I assume they tried stretching the batch will backfill soil (clay) and extra water.
Question is, Can I ignore this? I've heard of people using gravel instead on concrete which is kind of what I have now. I live in Saskatchewan Canada where the winters can get down to -35C. Just concerned how the fence posts will look after a couple of years.
We're probably in the same climate zone as you are (Zone 7, I think) and here, we put the fenceposts down 4 feet, to account for frost heave...Now we get winters, but nothing like your winters so I would have thought 4-feet deep to be standard, but I guess not. Was there a contract?
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